Universal brace.



we.l 56mm. Patented Nav. 6,1900.

s. MccLELLAN. Y

UNIVERSAL BRACE.

(Application filed Feb. 24, 1900.\

2 Sheets-Sheet I.

No. BELLEN. Patented Nov. 6, |900.

" S. MCCLELLAN.

UNIVERSAL BRACE.'

(Appl t nldFb 24 1900) 2 Sheets-Sheet 2.

(No Model.)

@mib/wwe@ trici..

STEPHEN MCLELL-AN, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO DENNISNUNAN, OF SAME PLACE.

UNlVERSAL BRACE.

SPECFICATION forming part of Letters Patent No. 661,419. dated November6, 1900,

Application led February 24, 1900. AvSerial No. 6,386. (No model.)

T0 all whom t may concern:

Be it known that L STEPHEN MCCLELLAN, a citizen of the United States,residing at New York city, in the county of New York and State of NewYork, have invented certain new and useful Improvements in UniversalBraces; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates-toimprovements in bit-braces; and it consists in animproved form of brace having a V guide which is substantiallyright-angled and mechanism mounted therein for driving a bit so arrangedthat the crank-arm of the handle may turn in a corner without strikingthe wall or without striking a plane support should the guide restthereon when boring a hole'.

This invention has particularly for its object to provide certainimprovements upon the devices shown and described in my Patent No.585,531, dated June 29, 1897, the particular improvements consisting inmeans for allowing the bit-chuck to be turned for boring around a corneror obstruction and also certain other improvements looking toward theuniversal adaptability of the device hereinafter described and claimed.

My invention will be understood by reference to the accompanyingdrawings, wherein the same parts are indicated by the same lettersthroughout the several views.

Figure l represents a side elevation of one form of my machine in ahorizontal position. Fig. 2 represents a top plan View of the same, thedotted lines in said figure indicating the angular adjustability of thebit-chuck. Fig. 3 represents a detail view of an attachment intended foruse when desired upon the machine shown in Figs. l and 2 for feeding.7Fig. 4 is a detail sectional View of the ratchet mechanism for rotatingthe driving-spindle and also shows the crank connections therewith. Fig.5 is a detail sectional view showing the connection between thehandle-rod and the bracket by means of which it is held, and Fig. 6represents a side elevation of a modified form of my machine.

A represents a casting or guide carrying at its forward portion thechuck B. rlhis chuck, as shown in Fig. 2, consists of a socket B0 forthe insertion of the bit anda pair of springarms E', arranged to bebrought together upon the bit-shank or released therefrom by aninclosing sleeve B2, provided with internal screw-threads engagingscrew-threads upon the exterior of the chuck-spindle B3.

The castingAis provided with inclined side walls A2, preferably at ornearly at right angles to each other. The two sides A2 form a V-shapedguide adapted to fit snuglyin corners of walls, cabinets, or the like,whereby the tool may be steadied in use. The rear end of theguide-casting is preferably made solid, as at A4, and extending upwardlyand rearwardly to form the journal-bearing A5, having central axialopening through which passes the driving-spindle E, which drivingspindleE is connected to the chuck-spindle B3 by means of a universal joint D,as shown most clearly in Fig. 2, or by means of a beveled gear or anyother convenient connection by which a rotation of the spindle E may beimparted to the chuck-spindle The driving-spindle E has mounted upon itsend E a ratchet-wheel E2, which is held thereon by means of a pin at e2passing through both the huh of the said ratchet-wheels and the saiddriving-spindle E,as seen most clearly in Fig. 4.

Acasing or head Ais mounted loosely upon the end of the bearing-sleeveA5 and is provided with an opening c, in which the ratchetwheel E`la isinclosed, and the said head and ratchet-wheel may rotate with respect toeach other, the said head A being retained in position upon thebearing-sleeve E by the said ratchet-wheel, which is secured upon theend of the spindle E.

A beveled pawl A7, having a stem a7, is fitted into the said head andarranged to engage the sides of the teeth of the wheel E2, as shown inFig. 4. The ratchet A'T is held in engagement with the wheel E2 by meansof a coil-spring cx, which surrounds the stem a7. The stem a7 isprovided with a milled head a5, by means of which it may be turned, andbeneath this milled head are provided one or more teeth or projectionsd4, arranged to engage any one ol a series of notches ai* in the ICOcylindrical extension CL2 or top of the head A5, as seen in Figs. 2 and4. The pawl A7 may be set to rotate the driving-spindle E in eitherdirection by adjusting the same through hall'` a rotation of its stem,and it may be adjusted to lock the head A6 against rotation with respectto the wheel E2 and the driving-spindle E bya quarter-turn. This is trueby reason of the ratchet having but a single bevel and two opposite flatsides, which latter when turned to engage The teeth lock the same. Thehead A6 is split at A2 and provided with an enlarged opening A9 for thereception of the sliding arm F of the hand-crank, the said sliding armbeing clamped in the opening A9 in the said head by means of athumb-screw 61,8, which engages in a screw-threaded opening et in thesaid head and is arranged to draw the split portions of the headtogether upon the crank-arm F.

H represents a frame comprising a closed sleeve I-I and a split sleeveH2, connected at an angle of approximately forty-five degrees by anintegral or rigid Webbed portion t. The split sleeve H2 fits looselyover the bearing-sleeve A5, whereon it may be clamped by means of thethumb-screw h2 engaging lugs 71,3, provided with screw-threaded openingsfor the reception of the Said thumb-screw. Into the closed sleeve H'lits the end of the rest-rod K. said sleeve H by means of a hooked pinH5, the shank h of which works through one opening through the sleeve Hland the point h5 of which moves through another opening in the saidsleeve. The shank portion of the said hooked pin is elongated andprovided with screwthreads, upon which engage a thumb-nut H4 fortightening and loosening the said hooked pin to secure or disengage therest-rod K. The rest-rod K is provided with an opening k, which islocated at such a distance from the end of the said rod that when theend of the said rod has been inserted -into the sleeve sufficiently tocome into contact with the shank h4 of the hooked retaining-pin and itsthrough movement is arrested the said opening 7c will be positioned forthe engagement of the point h5 of the said retaining-pin. By means ofthis arrangement the connection between the rest-rod K and the sleeve orsocket H may be immediat-ely effected. lVhen thus connected to thesleeve or socket H', the rest-rod K and the frame H are rigid withrespect to each other.

Ashereinbefore stated, the split sleeve H2 is adjustably held upon therigid bearingsleeve A5 by means of its clamping-screw h2, hereinbeforedescribed.' The said bearingsleeve A5 may thus be clamped in the saidsleeve at any position Within the limit of its adjustment, so that whenfor any reason it Would be desirable to turn the frame A and thebit-chuck olf to one side or the other at an angle to the direct line ofoperation of the machine (represented by the rest-rod K) this may beeffected by simply loosening up on the This rod K is secured into the``clamping-screvv71,2 and then turning the bearing-sleeve A5 sufficientlyin either direction to throw the bit-chuck B as far to the one side orthe other of the central straight line as is desired. In this adjustmentthe bearingsleeve A5 merely rotates Within the clampingv sleeve H2Without altering its position of angularity with respect to the rest-rodK, while the frame A and the bit-chuck are given a tilted effectproportionate to the extent. of the rotation of the said bearing-sleeveA5, which is integral with the said frame.

As shown in Figs. l and 2, the rest-rod K may carry at its rear ends ahand-rest K and a breast-rest K2, the latter at the extreme end thereof,and both being located upon an angular extension K3 of the rest-rod K.In this form of the machine the hand-crank has but a single arm F, ashereinbefore described.

In Fig. G I have shown a modification in the form of the rest-rod. Inthis view the rest-rod K5 is provided at its rear end with a curvedextension K6, which terminates in a retroverted end K7 in line with thedrivingspindle E when in operative position, and upon this extension K7is mounted a head KS, split, as at 705, for the reception of thecrankarm F2, which is secured therein by means of a clamping-screw k2.The handle F3 connects the ends of the two crank-arms F and F2. Upon thecurved portion of the rest-rod K6 is mounted the hand-rest K', and anadjustable breast-rest K9 is also preferably mounted thereon.

In Fig. 3 I have shown a device for use in providing a force-feed to thebit where nec` essary or where the necessary feed cannot be given bymeans of the ordinary rests. This device consists of a cylindricalsleeve S, arranged to fit over the rest-rod K adjacent to the sleeve orsocket H and to be held thereon against rotation by means of a pin orpins s, fixed on the rest-rod K and arranged to engage in a notch ornotches so at one end of the said sleeve S. The said sleeve S iseXteriorly screw-threaded for its entire length, and fitted thereon isan interiorly-screW-threaded sleeve S0, having Aa milled boss orenlargement S', by means of which the sleeve S0 may be turned.

A hub having integral pins .or lugs s2 is mounted in an annular recessupon said sleeve S5, so as to admit of rotation of said sleeve and thesaid hub with respect to each other. In use theeXteriorly-screW-threaded sleeve S being in position upon the rest-rod Ka rope or chain is connected to some xed object in advance of the frameA and preferably in line with the axis of the bit, and the ends of thischain or rope are attached to the lugs or pins s2 upon the hub S2. Asthe boring progresses the frame of the machine may be advanced and givena forward pressure on the bit by the turning ofthe sleeve S0 by means ofthis milled boss S'. This feeding device is principally intended for usein drilling or boring metal or hard Wood.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is

l. In a detachable rest for bit-braces, the combination with a framecomprising two sockets or sleeves set at an angle to each other, the oneto adjustably inclose a rigid portion of the frame of the brace, and theother to receive the forward end of the restrod or handle, and means forclamping one of said sockets or sleeves upon said rigid portion of thebrace-frame, allowing of adjustment in a circular direction about thesame, substantially as described.

2. In a detachable feeding device for bitbraces, the combination withthe resterod or handle; of a hollow sleeve adapted to fit over therestrod or handle, and having exterior screw-threads; aninteriorly-screW-threaded sleeve mounted thereon and provided with meansfor turning the same; and a hub or turnbuckle mounted loosely on thesaid outer sleeve and having hooks or ears for the at tachment of a ropeor chain, substantially as described.

3. In a detachable feeding device for bitbraces, the combination withthe rest-rod or handle; of a hollow sleeve adapted to iit over therest-rod or handle, and having exterior screw-threads; aninteriorly-screw-threaded sleeve mounted thereon and provided with meansfor turning the same; and a hub or turnbuckle mounted loosely on thesaid outer` sleeve and having hooks or ears for the attachment of a ropeor chain, and means for holding the inner sleeve against rotation onsaid rest-rod or handle, substantially as described.

4. A bitfbrace comprising a guide-frame, an inclined arm rigidlyconnected thereto, a shaft journaled in said frame and carrying a chuck,a second shaft in said inclined arm, gearing between said shafts, meansfor rotating said second shaft, and a breast-rest or handle connected tothe said inclined arm and adjustable thereabont, substantially asdescribed.

5. A bit-brace comprising a guide-frame, and an inclined arm rigidlyconnected thereto, a shaft journaled in said frame and carrying a chuck,a second shaft journaled in said inclined'arm, ratchet mechanism forrotating the lat-ter shaft, gearing between the said shafts, and abreast-rest or handle connected to the said inclined arm and adjustablethereabout, substantially as described.

6. A bit-brace comprising a guide-frame, an inclined arm rigidlyconnected thereto, a chuck, and means for driving the same carried bythe said guide-frame, a breast-rest or handle, and a sleeve connected tothe forward end thereof inclosing the said inclined arm, and means forclamping the said sleeve adjustably about the said inclined arm,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

STEPHEN MCCLELLAN.

Witnesses:

DWIGHT HILLIARD, A. HILLIARD.

